Technical Data; Thermal Mass Flow Sensor; Output Signals - TESTO 6457 Instruction Manual

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TECHNICAL DATA

4.1

Thermal mass flow sensor

The thermal mass flow sensor for compressed air volume flow
measurement works independently of the process pressure and media
temperature.
Sensor
Media
Accuracy
Temperature monitoring
Repeat accuracy
Display, operation
Display units*
Measuring dynamics
Response time
Pressure-tight
Media temperature
Perm. ambient temp.
Maximum permissible
relative humidity
Perm. storage
temperature
Media contact
Housing materials
Protection class
Electrical connection
Power supply
Readiness delay

Output signals

Analog output
Current carrying
capacity
Thermal glass-coated ceramic sensor
Compressed air, with special calibration also CO2, N2
Class 1-5-1:
± (3.1% of measured value + 0.5% of full scale value)
Class 3-4-4:
± (6% of measured value + 0.6% of full scale value)
Air quality according to ISO 8573 – 1.2010;
at media temperature 23 °C
± 2 °C
±1.5% of measured value
Colour display 1.44", 128x128 pixels, 2x LED, yellow
Nl/min, Nm³/h, Nm/s, Nm³, °C
1:300
0.1 s
Up to 16 bar overpressure
(> DN 200 up to 14 bar overpressure)
-10 °C to + 60 °C
0 °C to 60 °C
90% relative humidity
-20 °C to + 85 °C
V2A (1.4301), glass-coated ceramic, FKM,
PPS GF40, acrylate
PBT + PC-GF 30, PPS GF40
IP65, IP 67 / III
M12 x 1 connector, can be loaded to 150 mA,
short-circuit-proof
18 to 30 VDC, current consumption < 80 mA*
1 s
* according to EN 80178 SELV/PELV
4-20 mA, measuring range scaleable
max. load 500 Ω
2 x 150 mA, short-circuit-proof, protected against polarity
reversal
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